Means for protecting blast-furnace parts



E. L. IVES. MEANS FOR PROTECTING BLAST FURNACE PARTS. APPLICATION FI LED MAR 27. ms.

1,376,440. e d M y 3,1921.

UNITED STATES PATENT OFFICE.

EDWARD L. IVES, OF CHICAGO, ILLINOIS.

MEANS FOR PROTECTING- BLAST-FURNAGE PARTS.

Application filed March 27, 1918.

To (all whom it may concern:

Be it known that I, EDWARD L. Ivns, a. citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useprovision of heat insulation means to be applied to the charging bell and the portion of the charging hopper in such manner thatthese said portions will be protected from the intense heat developed during the reduction of iron and particularly if special grades of iron are produced such as ferromanganese,ferro-silica, speigel, etc.

Another object of my invention is the provision of means which will protect the exposed surfaces of blast furnaces from the effects of heat and will thus prevent breaking or warping of the parts in service.

A further object of my invention is the provision of heat insulating means for blast furnaces which can be easily applied, is simple in construction and efficient in operation and which will not break or crack in service, thus adding to the life of the parts of a blast furnace.

My invention will be better understood by reference to the accompanying drawings, in which Figure 1 is a vertical sectional view showing my invention applied to a blast furnace charging bell and hopper.

Fig. 2 is a sectional view looking downward from line 1-1 of Fig. 1, and

Fig. 3 is a detail view of the blast furnace bell showing the means of securing the insulating material to the blast furnace parts.

Referring now specifically to the drawings and in which like reference characters refer to like parts throughout, 10 is the charging hopper of a blast furnace, the bottom of which is formed by the bell 11, held in proper position by any suitable suspension means, such as a rod 12 connected to eye bolts 13 extending through the top of the blast furnace bell.

In contact with the under surface of the blast furnace bell I provide a layer of heat resisting material 14:, such as vitro fire felt or the like. The heat resisting material 1 1 Specification of Letters Patent.

Patented May 3, 1921.

Serial No. 224,926.

may be applied in any manner desired but I prefer to apply. the material in sections, the

sections being triangular in shape and applied so that they radiate outward from the center of the bell and are held in position by angle irons 15, the angle irons extending along the edges of the sections of the heat resisting material.

Spaced apart a suitable distance and extending through the vertical portions of the angle irons 15 are rivets 16 which hold the sections of heat insulating material together and prevent lateral movement of the said sections. Lug bolts 17 having threaded engagement with the blast furnace bell 11 by means of holes tapped in the blast furnace bell and placed between the angle irons hold the sections of heat insulating material in position on the under side of the blast furnace bell. A washer 18 through which the bolt 17 extends spans the opening between each of the angle irons 15 and enables the lug bolts17 to hold the sections in proper position. Spacing members 20 are placed between the angle irons 15, 15 to permit the angle irons from binding on the lug bolts 17, the spacing members being usually placed adjacent the rivets 16, and may be either hollow sections of pipe or any other suitable device.

Superimposed over the heat insulation 14 and the angle irons 15 is a layer of expanded metal 19, the lug bolts 17 also passing through the expanded metal. Applied to the metal member 19 and covering the heads of the lug bolts 17 I apply a layer of retort cement 21 which not only furnishes'additional heat resisting means to the heat insulation member 14 but also provides proper heat protection for the angle irons 15 and lug bolts 17, and expanded metal 19 by means of which the heat insulation is secured to the blast furnace bell.

Applied to the outside lower portion of the wall of the charging hopper 10 I provide a layer of heat insulating material built up and secured to the wall of the hopper in the same manner as to the blast furnace bell, the sections of material being made up to conform to the surface sought to be protected. Brick work 23, 23, protects the top of the furnace and a portion of the lower walls of the charging hopper from the effects of the heat of the blast furnace.

At the top of the insulation on the under side of the blast furnace bell 11, I provide I comprising layers of heat resisting elements,

' comprising layers of heat resisting elea circular piece of vitro fire-felt 24, which thus closes up the opening at the top of the insulation and protects the top of the blast furnace bell, and the bolts 13 forming the suspension means for the bell. It will thus be seen that I provide a structure which conforms to the contour of the surface sought to be protected, and which may be applied to or varied in any manner desired in order to obtain the desired results.

While I have described more or less precisely the details of construction which I employ, I do not wish to be understood as limiting myself thereto, as I contemplate changes in form and the proportions of parts and the substitution of equivalents as circumstances may suggest'or render expedient without departing from the spirit or scope of my invention. And it will be further understood that while I have shown and described my invention as applied to a blast furnace, it is susceptible of many other uses where heat insulation is desired, and such uses I consider as a part of and within the scope of my invention.

I claim 1. In combination, fabricated heat insulating means, and means for securing the said heat insulating means to a blast furnace.

2. In combination, heat insulating means and means interposed between the said layers for securing the heat insulating means to a portion of a blast furnace.

3. In combination, heat insulating means ments superimposed upon each other, and

means for securing the heat insulating means to the blast furnace.

4;. In combination, heat insulating means, angle iron supports for said heat insulating means, and means for securing the said angle iron supports to a portion of a blast furnace.

5. In combination, heat insulating means comprising a layer of vitro fire felt, supports for the vitro fire felt, an expanded metal member covering said vitro fire felt and supports and a layer of retort cement superimposed upon the expanded metal member, and means for securing the heat in- 7 sulation means to a blast furnace.

6. In combination, heat insulating means comprising a layer of vitro fire felt, angle iron supports for said vitro fire felt, a protecting member for said fire felt and supports, lug bolts inserted between the angle iron supports for securing the heat insulating means, to a portion of a blast furnace, the said protecting member having imposed thereon a layer of retort cement.

7. In combination, sectional heat insulating means, angle iron supports for said sectional means for preventing lateral movement of the said sections, expanded metal members covering said sections, lug bolts extending through said expanded metal members and between the angle irons for securing said sections to a portion of a blast furnace, and a layer of retort cement imposed upon said expanded metal members.

Signed at Chicago, State of Illinois, this 25th day of March, A. D., 1918.

EDWARD L. IVES. 

